[E90joee]

So i just installed my AA tune yesterday evening..was good up until this evening going to work it was bumper to bumper so no spirited driving and then my check engine came on with the lift logo

Car went into a limp mode and couldnt accelerate at all..as i pulled over i shut the car off and then ran it up again car ran fine but check engine light was still on

Has this happened to anyone afer the AA tune or in general? Any help would be appreciated as this is the first time having trouble with my car

[RedRanger]

Yes, still happening to mine. AA isn't helping as they are stating that there is nothing wrong with the tune. I replaced the plugs and it is still an issue. Bmw thinks it is a throttle body issue. Who knows.

[ZeroSum]

Yes it happens. I have not gotten an overall fix for it other than "here try this tune"

[E90joee]

Originally Posted by ZeroSum

Yes it happens. I have not gotten an overall fix for it other than "here try this tune"

Thats kind of shitty...so ill just have to deal with worrying when will my car stall out on me everytime i drive

[ZeroSum]

Speak with Nic, he is by far the best person I have dealt with there.

[E90joee]

Originally Posted by ZeroSum

Speak with Nic, he is by far the best person I have dealt with there.

Thanks man i will call first thing monday

[tom.gnade]

Ok this makes me not want to install this thing holy cow how many people has this happened to?

[E90joee]

Originally Posted by tom.gnade

Ok this makes me not want to install this thing holy cow how many people has this happened to?

Yea reallt if ive seen this before hand i wouldnt of wasted almost 700$ on this to just be worried whenever my cars going to break down

[E90joee]

Still having this problem...on cold days which is mostly everyday here so far in NY it hivrevs then settles down. Mostly highway cruising when im accelerating more it struggles to pick up and sometimes feels like it surges and it eventualy stalls out and its really annoying. At red lights it idles eratic sometimes even jerks the car like someones pressing the gas an brake at the same time. Not real happy with AA.

[Eagle1oh7]

Shoulda gone with BPC.

[iahawkeye]

It's probably just the tune exposing an issue that's been looming. I've had the aa tune (and am currently trying running their beta 3 stage tune) for 4 years and at most I'll get an obd CEL that goes out after a couple drive cycles. But only immediately after I flash the ecu.

Start troubleshooting your hardware alongside your chat with AA.

[W37V]

Originally Posted by E90joee

Still having this problem...on cold days which is mostly everyday here so far in NY it hivrevs then settles down. Mostly highway cruising when im accelerating more it struggles to pick up and sometimes feels like it surges and it eventualy stalls out and its really annoying. At red lights it idles eratic sometimes even jerks the car like someones pressing the gas an brake at the same time. Not real happy with AA.

Have you ever scanned for codes? If so, what were results? Btw. I'm not talking about OBD codes, but shadow BMW specific codes.

I would suspect an vacuum leak or faulty maf. Have you tried going back to stock tune and seeing if the problem is still there?

[E90joee]

Originally Posted by W37V

Have you ever scanned for codes? If so, what were results? Btw. I'm not talking about OBD codes, but shadow BMW specific codes.

I would suspect an vacuum leak or faulty maf. Have you tried going back to stock tune and seeing if the problem is still there?

just did that today as the cars been worse within the past 24 hrs.

scanned with the aa program got

2f7b oil pressure switch plausibility
29e0 fuel oil mixture control
29e1 fuel mixture control 2
2d06 air masss system
2d29 differential pressure sensor, suction pipe plausibility
29dc cyl injection switch off

(this was scanned the first couple days I got the tune now with the new update I was having trouble with the program reading the obd today)

I changed differential oil this past summer maybe something went wrong there and now its showing after tune..

[rick100]

Originally Posted by Eagle1oh7

Shoulda gone with BPC.

As far as I have been reading a lot of guys with BPC also have erratic RPM at idle, more so than the guys with AA. Although its not a fair comparison as most guys are probably running AA as BPC is still kind of new

I think its more of a car issue than a tune issue ...

[W37V]

Originally Posted by rick100

As far as I have been reading a lot of guys with BPC also have erratic RPM at idle, more so than the guys with AA. Although its not a fair comparison as most guys are probably running AA as BPC is still kind of new

I think its more of a car issue than a tune issue ...

It's not tune specific. I experienced with both of AA tunes and now with BPC. In all 3 cases, it went away after a tank of gas. Right now it's solid.

Your definition for "a lot" is very broad. IIRC, so far only 3-4 people (including myself) complained about BPC idle and all of us said it got better. There was bunch of people complaining about AA idle too. Some never got better.

[W37V]

Originally Posted by E90joee

just did that today as the cars been worse within the past 24 hrs.

scanned with the aa program got

2f7b oil pressure switch plausibility
29e0 fuel oil mixture control
29e1 fuel mixture control 2
2d06 air masss system
2d29 differential pressure sensor, suction pipe plausibility
29dc cyl injection switch off

(this was scanned the first couple days I got the tune now with the new update I was having trouble with the program reading the obd today)

I changed differential oil this past summer maybe something went wrong there and now its showing after tune..

That is a lot of codes. Have you tried resetting them and seeing if they come back? Some codes pop-up when you apply the tune. That is why it's recommended to clear them out after the install. If codes come back after after clearing, then they might indicate issues. Sometimes, tunes can reveal an issue which was already present, but hidden due to lower sensitivity of stock tune. (e.g. bad throttle body causing issue with supercharger, etc.)

For MAF: Try cleaning (or swapping maf) and see what happens. Try disconnecting it completely and see how the car runs.

[E90joee]

Originally Posted by W37V

That is a lot of codes. Have you tried resetting them and seeing if they come back? Some codes pop-up when you apply the tune. That is why it's recommended to clear them out after the install. If codes come back after after clearing, then they might indicate issues. Sometimes, tunes can reveal an issue which was already present, but hidden due to lower sensitivity of stock tune. (e.g. bad throttle body causing issue with supercharger, etc.)

For MAF: Try cleaning (or swapping maf) and see what happens. Try disconnecting it completely and see how the car runs.

yea Ive seen a couple threads with maf flow codes and fuel oil mixture so ill be starting there first I also have coils and plugs which ill do after and see how the car responds

[gunnerxq]

Originally Posted by iahawkeye

It's probably just the tune exposing an issue that's been looming. I've had the aa tune (and am currently trying running their beta 3 stage tune) for 4 years and at most I'll get an obd CEL that goes out after a couple drive cycles. But only immediately after I flash the ecu.

Start troubleshooting your hardware alongside your chat with AA.

Hmm tell me more about this beta 3 stage tune.

[Eagle1oh7]

Originally Posted by rick100

As far as I have been reading a lot of guys with BPC also have erratic RPM at idle, more so than the guys with AA. Although its not a fair comparison as most guys are probably running AA as BPC is still kind of new

I think its more of a car issue than a tune issue ...

Yes. I was one of those people, but now it's gone. Right now my car has P140a(SAP) and the CEL is gone but the code is still there. I'm not sure if it's an N51 quirk with the tune or not.

[E90joee]

this is what im pretty much dealing with

[E90joee]

btw brake 4x4 and dtc is all old due to transfer case

[W37V]

Originally Posted by E90joee

this is what im pretty much dealing with

That looks like normal idle fluctuation that happens after flashing.

I'll pm you how mine looked like after my recent flash.